It happens every year, right around tournament time. This year seemed to be a bit worse. Yet the log-in could prevent a lot of those drive-by postings.
As you have probably noticed, The Mat when through a change recently. They always required a Log-On before, yet they did ratchet up the "moderation" during the transition. I suspect the last thing you want to do is babysit a web site ...
It'll be interesting to see what happens. I usually drift away at this time of year as HS is over, I follow FS and GR not too much, and I'm drawn more to D1.